KR20110121878A
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Power generating apparatus using wave
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KR20110112706A
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Apparatus for energy transformation connected to rotating axis
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KR20110096622A
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Material having space filled with lighter material and apparatus of making the same
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KR20110093423A
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Fence type power generating apparatus using flowing water
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KR20110092065A
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Apparatus for power generation using air pressure
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KR20110086277A
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Apparatus for power generation using flowing fluid in piping and elelctric power generator using the same
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KR20110086274A
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Apparatus for power generation using flowing fluid in piping and elelctric power generator using the same
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KR20110081485A
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Variable fin assembly
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KR20110080973A
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Method of providing differentiated contents according to user group
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KR20110075175A
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Apparatus for air concentration and piping equipment having the same
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KR20110064080A
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Apparatus for mixing fluids
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KR20110054228A
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Piping laid upward for using or inducing pressure difference between building upper portion and lower portion
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